Celestia's kept a tight rein on Discord, since she doesn't have much use for Chaos. She won't even let him relax by making a life-sized Apploosan snow globe. With his frustrations wound tight, he must ease off some energy without the Princess finding out and so turns to Fluttershy to invoke a Very Big Favour.

Catface Icemane has always been a bit of a womaniser, bit of a sex addict. Cast out from his home, he has decided to give Ponyville a visit. After all, while he may not have a home there, he could certainly borrow some from some of the mares - and stallions.